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Poison hemlock (Conium maculatum) identification and control

King County Noxious Weeds · 2024

Traditional / reference

Abstract

King County (Washington) noxious-weed profile for poison hemlock: stems have red or purple spots and streaks, are not hairy, and are hollow; plants have a strong musty odour when crushed; eating even a small amount of any part can kill people and livestock; and poison hemlock can be confused with many edible members of the parsley family including fennel, chervil and anise. Anchors the purple-spotted hairless stem and mousy smell as the distinguishing tests.

Referenced for these plants

How to cite

King County Noxious Weeds (2024) 'Poison hemlock (Conium maculatum) identification and control'. Available at: https://kingcounty.gov/en/dept/dnrp/nature-recreation/environment-ecology-conservation/noxious-weeds/identification-control/poison-hemlock

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